21411366410560 has 168 divisors, whose sum is σ = 59569036924680. Its totient is φ = 7308981743616.

The previous prime is 21411366410521. The next prime is 21411366410569. The reversal of 21411366410560 is 6501466311412.

It can be written as a sum of positive squares in 4 ways, for example, as 1641391444224 + 19769974966336 = 1281168^2 + 4446344^2 .

It is a super-2 number, since 2×21411366410560² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21411366410569) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 609234 + ... + 6572206.

Almost surely, 2^{21411366410560} is an apocalyptic number.

21411366410560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21411366410560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29784518462340).

21411366410560 is an abundant number, since it is smaller than the sum of its proper divisors (38157670514120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21411366410560 is a wasteful number, since it uses less digits than its factorization.

21411366410560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5963233 (or 5963216 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 21411366410560 in words is "twenty-one trillion, four hundred eleven billion, three hundred sixty-six million, four hundred ten thousand, five hundred sixty".